Commit b671cd3d authored by Philip Yang's avatar Philip Yang Committed by Christian König
Browse files

drm/prime: Support page array >= 4GB 



Without unsigned long typecast, the size is passed in as zero if page
array size >= 4GB, nr_pages >= 0x100000, then sg list converted will
have the first and the last chunk lost.

Signed-off-by: default avatarPhilip Yang <Philip.Yang@amd.com>
Acked-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230821200201.24685-1-Philip.Yang@amd.com
parent 2c80a2b7

drivers/gpu/drm/drm_prime.c

+1 −1
Original line number Diff line number Diff line
@@ -820,7 +820,7 @@ struct sg_table *drm_prime_pages_to_sg(struct drm_device *dev, 
	if (max_segment == 0)

		max_segment = UINT_MAX;

	err = sg_alloc_table_from_pages_segment(sg, pages, nr_pages, 0,

						nr_pages << PAGE_SHIFT,

						(unsigned long)nr_pages << PAGE_SHIFT,

						max_segment, GFP_KERNEL);

	if (err) {

		kfree(sg);